Subaru LEGACY 2002 - Page 254

Cooling
RADIATOR FAN
CO-8
B: FUNCTION
The operation of the radiator fan is controlled by the ECM, depending on the signals from the en-
gine coolant temperature sensor, vehicle speed sensor and A/C switch as shown below.
Vehicle speed
A/C
com-
pressor
A/C
pres-
sure
switch
level
Engine coolant temperature
Lower than 95°C
(203°F)
Between 95 and 99°C
(203 and 210°F)
Higher than 100°C
(212°F)
Operation of radiator fans Operation of radiator fans Operation of radiator fans
Main fan Subfan Main fan Subfan Main fan Subfan
Lower than 19 km/h
(12 MPH)
Off Off Off Low-speed Low-speed Mid-speed Mid-speed
On Low Low-speed Low-speed Mid-speed Mid-speed High-speed High-speed
High Mid-speed Mid-speed High-speed High-speed High-speed High-speed
Between 20 and
69 km/h
(12 and 43 MPH)
Off Off Off Mid-speed Mid-speed High-speed High-speed
On Low High-speed High-speed High-speed High-speed High-speed High-speed
High High-speed High-speed High-speed High-speed High-speed High-speed
Between 70 and
105 km/h
(43 and 65 MPH)
Off Off Off Mid-speed Mid-speed High-speed High-speed
On Low Mid-speed Mid-speed High-speed High-speed High-speed High-speed
High High-speed High-speed High-speed High-speed High-speed High-speed
Higher than 106 km/h
(66 MPH)
Off Off Off Mid-speed Mid-speed High-speed High-speed
On Low Off Off Mid-speed Mid-speed High-speed High-speed
High Mid-speed Mid-speed Mid-speed Mid-speed High-speed High-speed